Question

activity 17: quiz
module: nervous
topic: structures / type: combination

what structure is highlighted?

a. optic tract
b. optic chiasm
c. optic n. (cn ii)
d. lens
e. cornea

attempt: 1/1
question 25/25
correct: 21
score: 84%
activity 17/18

Explanation:

Identify the highlighted structure

Using the Optic Chiasm Anatomy knowledge point

The provided image shows an inferior (ventral) view of the human brain. The highlighted structure is the X-shaped junction located on the ventral surface of the brain, immediately anterior to the pituitary stalk (infundibulum) and hypothalamus. This specific anatomical intersection where the optic nerves partially cross is the optic chiasm.

Differentiate from other options

Using the Optic Chiasm Anatomy knowledge point

• Optic tract: These are the fiber bundles continuing posteriorly from the optic chiasm toward the lateral geniculate nuclei.
• Optic n. (CN II): These are the nerve bundles projecting anteriorly from the optic chiasm toward the orbits.
• Lens and Cornea: These are structures located within the eyeball itself, not on the ventral surface of the brain.

Answer:

• A. Optic tract
• B. Optic chiasm (Correct answer)
• C. Optic n. (CN II)
• D. Lens
• E. Cornea